In fact, one study found that peoples bodies absorbed about 49% of a 1-mcg dose of cyanocobalamin, compared to 44% of the same dose of methylcobalamin ( Conversely, another study comparing the two forms reported that about three times as much cyanocobalamin was excreted through urine, indicating that methylcobalamin may be retained better within your body ( However, some research suggests that differences in bioavailability between the two forms may be insignificant and that absorption could be influenced by factors such as age and genetics ( Unfortunately, recent research directly comparing these two forms of vitamin B12 is limited
CJC-1295 / Ipamorelin Strength: 10 mg / 10 mg A higher-strength option for patients seeking an expanded protocol under provider guidance
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Some people experience feeling worse after receiving a vitamin B12 injection, which can be disconcerting when you expected improvement
A 2020 study of "wellness" B12 injections in non-deficient adults found no improvement in energy, mood, or cognitive function versus placebo at 4 weeks (Wolffenbuttel et al., Nutrients , 2020)
These include: Meat Fish Poultry Milk Eggs Fortified breakfast cereals Fortified breads Fortified nutritional yeasts Fortified plant milks If you follow a vegan diet (meaning you don't eat any animal products, including meat, milk, cheese, and eggs) or you're a vegetarian who doesn't eat enough eggs or dairy products, you could be lacking in vitamin B12